Coronal magnetic field patterns inferred from radio observations

A noise storm center clearly associated to an active center has been followed from January 2 to January 8, 1969. The study of the mean distribution of continuum and of type 1 bursts has shown a global and systematic displacement interpreted in terms of the coronal magnetic structure. This structure is formed by field lines connecting the active center to a stable region of inverse polarity, characterized by the existence of a coronal condensation. These results show the possibility of using this method for the systematic study of coronal magnetic structures, the knowledge of which is vital as far as the problems of particle propagation in the corona and in the interplanetary medium are concerned.